JPH03150205A - Rotary ozonizer - Google Patents

Abstract

PURPOSE:To improve the cooling property of a dielectric material by comprising a centrifugal ventilator type case using the peripheral wall thereof as a discharge electrode, impellers whose blade portions standing face to face to the peripheral wall are employed as dielectric electrodes, a dielectric material coated on the surfaces of the dielectric electrodes and an AC high voltage electric source. CONSTITUTION:A rotary ozonizer is composed of a centrifugal ventilator type case 1 comprising a cylindrical peripheral wall 11 and side walls 12 closing the both the ends thereof, impellers 4 which is rotatably supported on the side walls 12 and whose blade portions standing face to face with the peripheral wall are also employed as dielectric electrodes 42, a dielectric material 6 coated on the surfaces of the dielectric electrodes 42 and an AC high voltage electric source 7 connected to both the electrodes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rotary ozone generator (hereinafter referred to as a rotary ozonizer), and specifically relates to a rotary ozonizer that has excellent dielectric cooling performance.

[Conventional technique vi] The rotary ozone generator disclosed in Japanese Patent Application Laid-Open No. 63-218503 uses both cars as discharge electrodes, the case surrounding them as an induction electrode, and the inner surface of the case is covered with a dielectric material. The ozone generating section and the ozone blowing section, which were conventionally separate, are integrated, and the device is made more compact by generating ozone by causing alternating current discharge between the two electrodes.

[Problem to be Solved by the Invention 1] Dust and nitrates tend to adhere to the dielectric surface, and due to these adhesion, the discharge path concentrates on a specific part of the dielectric surface, causing the dielectric to overheat. Due to overheating,
There were drawbacks such as cracks and insulation deterioration in the dielectric, and a decrease in ozone generation efficiency.

In the above-described rotary ozone generator, the discharge electrode is cooled well because it rotates at high speed. However, since the dielectric body that requires the most cooling is only cooled by the relatively low-velocity air blown out from the impeller, it overheats as the current density increases.

The present invention has been made in view of these problems, and an object to be solved is to provide an ozonizer with excellent dielectric cooling performance.

[Means for Solving the Problems] The rotary ozonizer of the present invention includes a centrifugal transport 8a type case, which is composed of a cylindrical peripheral wall and side walls that close both ends of the peripheral wall, and uses the peripheral wall as a discharge electrode, and a case in which the side wall is a rotatably supported impeller whose blade portion facing the peripheral wall also serves as an induction electrode; a dielectric adhered to the surface of the induction electrode; and an AC high voltage power source connected between the two electrodes. It is characterized by including the following.

- The discharge electrode may also be used by the peripheral wall of the case,
It may be supported by the case along the peripheral wall.

[Operation] When an AC high voltage is applied between the two electrodes, a discharge occurs in the gap between the two electrodes and on the surface of the dielectric material, and ozone is generated.

The high-speed airflow sent out in the centrifugal and rotational directions from the rotating impeller is guided by the circumferential wall of the case along with the generated ozone, swirls, and blows out to the outside.

In addition, the high-speed airflow moves at high speed relative to the blades and the dielectric, cooling the dielectric and further blowing away dust and nitrates on the surface of the dielectric.

[Example] An example of the rotary ozonizer of the present invention will be described with reference to FIGS. 1 and 2.

This rotary ozonizer has a cylindrical case 1 made of resin with an open end consisting of a peripheral wall 11 and a side wall 12, and this opening is closed at one end with a bottomed N2. And surrounding wall 1
A discharge electrode 5 having a cylindrical shape with both ends open and a portion cut out is fixed to the inner circumferential surface of the electrode 1 . As shown in FIG. 2, eight air intake ports 13 are provided radially on the side W12, and an air supply port 14 is provided at one end of the peripheral wall 11.

An output shaft 35 is provided on the inner surface of the side wall 12 on the axis of the peripheral wall 11.
The motor 3 is installed internally by aligning the two.

A resin pipe 32 is connected to the cylindrical case 1 from the side of the motor 3.
A resin-coated motor drive line 33, 34 and a ground line 72 protrude parallel to the axis through a hole opened in the side wall 12 of the piping 32, and extend from the pipe 32 to the outside. The motor 3 is a 100V single-phase induction motor, and the motor drive line 3
3 and 34 are connected to a commercial AC power source of 50 to 60 Hz.

The output shaft 35 of the motor 3 extending toward the lid 2 side has a disk 41 extending perpendicularly to the output shaft 35, and blades 42 extending parallel to the axis from the outer periphery of the disk 41. A fan-shaped impeller 4 made of a metal with good conductivity is fixed. The blade 42, which also serves as an induction electrode, is curved from the axis in the reverse rotation direction, as shown in FIGS. 2 and 3.
A gap 70 between the outer edge of the blade 42 and the discharge electrode 5 serves as a guide space for guiding the airflow coming out of the impeller 4 to the air supply port 14 and a silent discharge space.

As shown in FIG. 3, the surface of the blade 42 has a wall thickness of 0.5
A glass dielectric 6 with a thickness of ~1.5 mm is adhered to the disc 41 of the impeller 4, a metal output shaft 35, and a slip ring (not shown) fixed to the output shaft 35. It is electrically connected to the ground wire 72 via a fixed carbon brush (not shown) that slides on the slip ring. ground! ! 72 is connected to the low voltage output end of the AC high voltage power supply section 7, and the high voltage output end of the AC high voltage power supply section 7 is connected to the high voltage line 7.
1 to the discharge electrode 5. Incidentally, if the slip ring and each ring 42 of the impeller 4 are connected with a copper wire, the effect of reducing wiring resistance can be obtained.

Next, the operation of this rotary ozonizer will be explained.

When the motor 3 is rotated and an AC high voltage of about IKHz is applied to the discharge electrode 5, AC discharge occurs in the gap 70 between the two electrodes and on the surface of the dielectric 6, and ozone is generated. Further, the impeller 4 performs centrifugal air blowing from the intake port 13 to the air supply port 14, and the generated ozone is sent to an external target space.

The modified form is shown in FIG.

This ozonizer is different from the ozonizer of Example 1 shown in FIG. 1 in that a ring-shaped airflow guide groove 15 is provided in the axial center of the peripheral wall 11 in the outer diameter direction.

In this way, it is possible to reduce the swirling resistance of the high-speed airflow coming out of the blades 42, making it possible to increase the air volume and improving the cooling capacity.

Still another modification is shown in FIG.

In this ozonizer, instead of the cylindrical discharge electrode 5 of the ozonizer of Example 1 shown in FIG.
A discharge electrode 5a made of a metal mesh and having a substantially cylindrical shape is attached between the outer edge of the discharge electrode 2 and the outer edge of the discharge electrode 5a. ing.

In this way, the discharge electrode 5a can reduce the discharge voltage.
Even if the air flow is brought close to the outer edge of the blade 42, the air flow blown out from the blade 42 can pass through the discharge electrode 5a and turn through the widely spaced annular air flow guide portion 73, thereby reducing fluid resistance and increasing the air volume. This makes it possible to improve the cooling capacity.

Note that other power transmission means such as a rotary transformer may be used instead of the above-described conductive means consisting of the slip ring and carbon brush. In this case, by setting a high step-up ratio of the rotary transformer, the output transformer of the island voltage generating section can be omitted.

In addition, as another modification, the peripheral wall 11 can be made of metal and can be directly used as the discharge electrode 5.

In this case, it is preferable for safety to ground the discharge electrode 5 and apply a high voltage to an induction electrode that also serves as the blade 42 or is provided on the blade 42.

Furthermore, various ceramics and resins can be used as the dielectric material. Further, the dielectric 6 only needs to be attached to at least the portion of the blade 42 facing the discharge electrode,
It does not have to be applied to the entire surface of the wing 42. Further, in order to strengthen the bond between the dielectric material 6 and the blades 42, a dielectric material may be embedded in the blades 42 in a wedge shape. However, since an increase in the thickness of the dielectric 6 leads to a decrease in the amount of charge, the thickness should be appropriate in consideration of the life span.

[Effects of the Invention] As explained above, in the device of the present invention, since the dielectric is coated on the surface of the induction electrode provided on the impeller, the cooling performance of the dielectric is high. As a result, the durability of the dielectric material is greatly improved, and the current density per unit area of the induction electrode layer is increased, making it possible to realize compact and high-output devices. Ozonizer becomes possible.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view of a rotary ozonizer according to an embodiment of the present invention, viewed in a direction perpendicular to the axial direction, Fig. 2 is a schematic cross-sectional view of the device shown in Fig. 1, viewed from the axial direction, and Fig. 3. 1 is a partially enlarged cross-sectional view of FIG. 1, and FIGS. 4 and 5 are schematic cross-sectional views showing still other modifications. 1... Cylindrical case (case) 2-... Lid (case) 3... Motor 4... Shoulder wheel 42... Wings (induction electrode) 5... Discharge electrode 6... Inductor 7.・-AC high voltage power supply section

Claims (1)

[Claims] (1) A centrifugal blower type case consisting of a cylindrical peripheral wall and side walls closing both ends of the peripheral wall, with the peripheral wall serving as a discharge electrode, and a blade portion rotatably supported by the side wall and facing the peripheral wall serving as an induction electrode. 1. A rotary ozonizer comprising: an impeller that also serves as a vane; a dielectric adhered to the surface of the induction electrode; and an AC high voltage power source connected between both electrodes.